Siemens 6RA70 Fault messages from motor sensors, F021 External fault, F022 External fault

Fault		Description
No.		Cause as a function of fault value	Further information (r047.002 to r047.016)
		(r047.001, r949.001 or r949.009 with acknowledged error)
F021	External fault 1
	(active in all operating states)
	Bit 15 in control word 1 was in the log. "0" state for longer than the time set in P360 index 001
F022	External fault 2
	(active in all operating states)
	Bit 26 in control word 2 was in the log. "0" state for longer than the time set in P360 index 002
F023	Fault message from free function block FB2
	(active in all operating states)
	Fault value:
	1	the binector wired via parameter U100 Index.001 is in the state log.”1”
	2	the binector wired via parameter U100 Index.002 is in the state log.”1”
	3	the binector wired via parameter U100 Index.003 is in the state log.”1”
	4	the binector wired via parameter U100 Index.004 is in the state log.”1”
F024	Fault message from free function block FB3
	(active in all operating states)
	Fault value:
	1	the binector wired via parameter U101 Index.001 is in the state log.”1”
	2	the binector wired via parameter U101 Index.002 is in the state log.”1”
	3	the binector wired via parameter U101 Index.003 is in the state log.”1”
	4	the binector wired via parameter U101 Index.004 is in the state log.”1”

9.1.2.4Fault messages from motor sensors

F025 Brush length too short (active in operating states of ≤ o3)

When parameter P495=2 (binary sensing of brush length), fault message at log.”0” signal (longer than 10s) at terminal 211 Possible fault causes

♦Encoder for brush length has responded

♦Open circuit in encoder cable

F026 Bearings in bad condition (active in operating states of ≤ o6)

When parameter P496=2 (bearing condition sensing) fault message at log. “1” signal (longer than 2 s) at terminal 212 Possible fault causes

♦Encoder for bearing condition has responded

F027 Air-flow monitoring of motor fan (active in operating states of < o6)

When parameter P497=2 (air-flow monitoring), fault message at log ”0” signal (longer than 40s) at terminal 213

Possible fault causes

♦Encoder for fan monitoring has responded

♦Open circuit in encoder cable

F028 Motor overtemperature (active in operating states of ≤ o6)

When parameter P498=2 (thermostat connected), fault message at log. “0” signal (longer than 10s) at terminal 214

Possible fault causes

♦Thermostat for monitoring motor temperature has responded

♦Open circuit in encoder cable

9-8	Siemens Energy & Automation
	SIMOREG DC Master Base Drive Panel Operating Instructions